Speed-controller for graphophones.



SONTHLLER FOR GRAPHOFHONES.

SPEED APPLICATION FILED IAN. 14, i915.

2 SHEET SHEET 2.`

vJOSEPH E. :SRAS-DUN, F 'NEW YORK, N. Y,

SlEijE-CGNTROLLEB, FR GRPHOPHONES.

nein-oca."

specificati@ ofvteu'ers raient.

lPatented Jun. 2, till 7.

Refiling of application Serial No. 758,380, filed April 2, 1913. This application filed January 14,1915.

SerialNoZA'Yj y f To a-ZZ lwhom t may concern:

Be it'knoivn'that I, Josemi H. Billionen', a

citizen of the United States., and a resident fof the city oi? New York, borough of Mair hutten, in' the county and Stato ot New Yorin have invented a' new. and improved Speed-Controller for Graphophones, of

which the it'ollmviing` is a full, clear, and eX- v act description. v

in' graphophones now in common use the record disk driven at a uniform rotative speed, the approved speed 'being 7 l. P. .VL n view et' this uniform speed ot rotation the surface speed, t the iucord track or spiral groove et the d: k maximum near th circumference and minimum at ythe center. Because of thi uniformly chang ig surface speed the record area the disk cannot re,- ceive much recordedy matter as 'would he possible 'with a clisk driven at a uniform surface speed and a constantly varying 'rotative speed. The desirahiity of driving the disk in making a recorcl at a uniform sur face speed has heen recognized, and `a. grajihophone based upon ,this principle is the Vsul iect matter of United Stateslictters Patent No'TBGS-i, granted. to C. S, Tainter, Jun@ ie, ieee. i

. The `potentei?. graphophone apparently has notilieen commercially introduced he cause of the r'ta-ot that the n'ianutocturers or' records would he compelled to 'produ-ce tivo types of records, one for the old. machines, where disk rotative speed is constant,

and another set for the type of machine where the surface speed is constant; or two kinds of machines must he provided. Be-l cause of this problem it is advantageous to provide a lgraphophonc which isconvertilile for use with hoth kinds' of records, and it is the object of the present invention to pro vide a graphophon'e which can hercaclily adjusted to obtain a uniform rotative 'speed for the record or a uniform surface speed In carrying ont the invention a device operatively connected with the recorder or reproducer-carrying arm is employed to operate on the brake shoe lever of the speed regulator, and by vthe adjustment. of this device to one position tire-brake shoe will engage the' brake disk the speed regulator Witha uniform friction when a uniform ro tat-ive speed of' the disk is :cle-sited, and when adjustedto another position the device will cause thc brake shoe to grip the brake disk with varying friction, which uniformly changes so that the record disk will rotate at a uniformly varying speed, but at a constant surface speed. rlhis device is so ar- Y after and set forth with particlila'rityin the claims appended hcretoiy ln the accompanyingv drawings, which illustrate one embodiment oi thc invention, and wherein similar reference characters are employed to designato correspondingparts throughout the several views; 'Figure l is a sectional fiew through the upper portion of a graphophone ot thc cabinet typc,f\vl1ercin tl'ic-ai'npliticr is cmliodiecl in the cabinet; Fig. 2 is a horizontal sectional view through the machine to show the diskulriving mechanism speed regulator and controlling device for the latter; Figi a perspective View or the controlling device removed; Figs. 4 and 5 are sectional views ot the controlling" device, showing' the cam thereof in diicrcnt operative positions with respect to the brake lover; lig. (i is a sido view showing; the means tor setting-thc device to olotain any desired initial speed oi' rotation; -nfl 7 is a plan view, partly in section, ot' 6. f

In the present instance an ordinary cabinet graphophone is shown, but it is to be understood 'that the inventionis not necessarily limited to this type et' machine.

A designatesV the hotly or caloinct of the machine equipped withthe usuallid l that inclosos the record disk 9, drivingtable 3, reproducer 4 and arm 5 that carries the reproducer. The reproduccr arm is connected loy a, tuheor neck G with the usual amplifier, not shown.' The driving mechanism B for the turn table 3 is niounted'on the under sident a plate 7 removably set into the hori- 6J ranged that it can be easily and quickly adleo zontal partition 8. As this mechanism Bl isof the usual form albriefl description will suffice. The vertical shaft lorspindle 9 is I. driven tlnough'worml gearing 10 by the 'spring motor 11, which is adapted tube wound by a shaft l2. As shown in Fig. 2,

, the turn table shaftl 9 has a worm gear 13 that meshes Iwith a Worin 1l that causesl the l eights or centrifugal elements 'of the speed regulator or governor to be rotated', and operatively connected with Qthese weights is the brake disk 1G. Coperating i 1` with this. brake diskfis a' shoe 17 carried byl .thereoii-` the attachment C is employed,

whereby the lever 18 can be Subjectedto a uniform pressure to obtain 'uniform rotative speedvoi:y the turn table 3, or subjected v to a variable pressure to. obtain variable roy tative speed of the turn table. This attachment while capable of various embodimerits, is shown in 'the present instance as consisting cfa band 21 which encircles the vertical portion 2O of the reproducer carrying arm, the vertical portion forming the axis on which the armV swings, and on the band 21 isa depending arm 22 that extends into the chamber that contains the operating mechanism for the turn table, there being on this arm an adjustable controlling device 23 which engages the brake shoe carrying lever 18. rllhis device 23 has two sur faces 24 and 25, the first of which is concentric with the axis of rotation of the reproducercarrying arm, and the second is eccentric thereto, andby moving the device 23 vertically on the arm 22,either the concentricv or eccentric surface canv be engaged with Ithe brake -shoe lever. To hold the device 23 in adjusted position a spring 2651s connected .with the device and equipped with a-pin 27 adapted to engage in upper' ,or-v

lower openings 28 and 29jin the Win22', and

opening and engaging it in the other a knob 30 is connected with the spring 2.6, so that:

. by pullingr outwardly on the spring the pin -position Shown' inv Fig. 4,- that is, engaged' can he, disengaged, and while the spring isv held outwardly the device 'be shifted 'up or down to engage lthe pin with the other opening. lVhen the bra-ke shoe lever 18 is inthe with vthe eccentric Isurace v25, 'the' pressure speed. W hen the brake shoe lever is in. the

position shown 5, the friction be:

. Having thus described mincet'iveen the brake shoe and disk .will be con stant during the travel of the reproducer carrying arm, and hence the rotative speed 'of the' record disk will be uniform.v In other words, when the device 23 is adjusted to `the positionshown in Figli, the machineA is adapted to operate on record' disksjwlich are produced at a. uniform surface'speed,

`while, when the device 23isadjusted toi the position shown'in Fig. 5, the machine/is set form rotative speed.. f l K f To provide. forpsetting-'tho device`23 to l to operate'-witnreeords intended fora yunli obtain the desired initial speed,'son1e'means must 'be provided to adjust thefdevice 23 toward or fromv the'brake shoef lever.` 18 to vary the pressure of 'the' brake; shoe 17 on the brake disklti. 'One way ofa cco 1 nplishl ing this result'is to make the arn1`j22fseparate from the supporting band. or ring 21,' andmove the arm 22 back or forth on the ring by a set screw 31.` or equivalent means; lVhen the proper'adjustmentis-obtained a clamping device, such as abolt, 32 passing through the parts 33 and-,340i the arm 22 and ring 21 is tightened.` 'This adjustment,'

however, is comparatively infrequent, as. it

isv intended primarily to 'compensate "for,

wear of the parts, or-for obtaining change in the initial speed at which the record disk is to he driven. c i

From the foregoing description taken 1n connection with the accompanying drawings, the advantages of the method oit-operation and ofthe apparatus shown will be readily understood, by those skilled' in the' art to which the invention appemains, and

while have described the apparatus which l now consider to be the best embodiment thereof, l desire tohave vit.understood that the apparatus shown is merelyillustrative,

and that such changes maybe made-when desired as are within pended claims. j l, ention, I claim as new and desire to /seure by Let- `f ters Patent for conveniently releasingfthe pin from 'one i 1. Inagrapho hone',jthe combination-'of a casing, a 'grap ophone record disk sup.-

port mounted outside Mieming, adrivingr mechanism` within 'the casing-'andpoperaf tively connected with the 'support for ro- Y the seppe/o Itheraptating the same,'said mechanism' including A a' speed governor, a sound boxcarrier in the 'form. of` a hollow tone arm lhaving' a" vertical portion serving as'the axisgon which the arm swings, .said "erin Iloeing movable by the grooves" inthe-record and mounted eaterioriy tov .the casing and in. coperativelrelationwitli'the. said support and a device ,carried by. and

movable vwitn the` vertical pmtiony of- ,the

tone and entendng'nto the casing controlthe' governor for obtannng a uniform. rotativelspeed of the record .1

'slr sapm 13e port, or a progressively varying rotative speed thereof. i

2. In a graphophone, the combination of a reproducer, a tone arm supporting the reproducer, a record disk driving mechanism including a speed governor, and afdevice mounted on the reproducer tone arm and adjustable to liferent positions to control the speed governor for obtaining a uniform rotative speed or a progressively varying rotative speed of the record disk..

3. The combination of a carrier for a sound box, a record diskdriving mechanism, a speed governor including a brake disk, a controller therefor consisting of a brake shoe element. engaging the said disk, and separate surfaces movable with the said carrier to operate on the brake shoe element to obtain a uniform rotative speed or a progressivelyvarying rotative speed of the record disk.

el. The combination of a swinging reprodimer-carrying arm, mechanism for driving a record disk, a governor therefor including a brake shoe element, a device having separate surfaces respectively concentric i and eccentric te the axis on which the re producer carrying arm swings, and-means for adjusting the device to engage either surface with the brake shoe element.

5. The combination of a swinging reprol dimer-.carrying arm, mechanism for driving a record disk, a governor therefor-including a brake shoe element, a device -having separate surfaces respectively concentric adjusting'the device to engage either surface with the brake shoe element, and meansv name to this specification in the presence of two subscribin Witnesses.

JO EPH H. BRAGDON. Witnesses:

C. BRADWAY, G. H. EMsLiE.

and eccentric to the axis on which the rev 1 producer carrying arm swings, 4means for 

